Mag-Drive Sealless Centrifugal Pumps
When zero emissions, no leaks, and low maintenance matter most, mag-drive is the answer. We size polymer (PP/PVDF) and ETFE-lined metallic builds with SiC bearings, robust magnet sets, and run-dry protection for acids, solvents, oxidizers, and high-purity service.
- Sealless containment shell eliminates mechanical seals & fugitive emissions
- High chemical compatibility with PP, PVDF, ETFE, and 316/duplex options
- Quiet, efficient operation with simple piping and compact footprint
- Available ANSI dimensional patterns and high-purity builds
Manufacturers We Represent for Mag-Drive
Featured Mag-Drive Products
What Makes Mag-Drive Different (and When It Beats Other Pumps)
How Mag-Drive Pumps Work
- A driven outer magnet on the motor couples through a containment shell to an inner magnet on the impeller.
- No dynamic shaft seal—no emissions, no seal water, and fewer leak paths.
- SiC or carbon bearings ride on the pumped fluid—select materials to match chemistry & solids risk.
Where Mag-Drive Wins
- Corrosives/oxidizers (HCl, H2SO4, NaOCl, HF), solvents, and high-purity streams
- Environmental compliance: zero-emission, LDAR-friendly, no seal plans to maintain
- Batch/utility chemical transfer where reliability and cleanliness beat speed
- RO/CIP chemical feed (clean fluids, steady duty)
Best-Fit Mag-Drive Configurations by Service
| Service | Ideal Configuration | Recommended Brands | Why It Works |
|---|---|---|---|
| Strong acids / oxidizers | PP/PVDF wet end; SiC bearings; graphite/PTFE gaskets | Iwaki • Finish Thompson | Top compatibility; no seal faces to attack or blister |
| Solvents (ketones/aromatics) | ETFE-lined metallic casing; reinforced magnet set | Iwaki • Finish Thompson | Lined metallurgy handles permeation; torque margin for thin fluids |
| High-temp or pressure | Metallic mag-drive with ETFE lining, heat-soak control | Iwaki • Finish Thompson | Strength & temperature limits exceed plastics |
| Off-gassing (NaOCl) | Gas-handling volute, venting strategy, flooded suction | Iwaki • Finish Thompson | Prevents vapor lock and decoupling during starts/stops |
| High purity / electronics | Virgin PVDF, high-purity seals/gaskets, leak detection | Iwaki | Clean wetted path with ultra-low extractables |
Sizing inputs: flow/head, SG & viscosity, temp & vapor pressure, fluid SDS, suction geometry/NPSHa, duty cycle, solids risk.
Materials & Performance
Wetted Materials
- PP / PVDF — acids/oxidizers at ambient to moderate temps
- ETFE-lined metallic — solvents, higher temp/pressure, permeation control
- Bearings: SiC/SiC (hard, chemically inert) or SiC/carbon for lubricity
- Containment shell: metallic or engineered composites; consult for eddy-current losses
Real-World Ranges
- Flow: fractional to ~800+ GPM (model-dependent)
- Head: to ~300+ ft TDH (clean fluids)
- Viscosity: best on <~200 cP; verify torque for higher
- Solids: minimal—use strainers; for slurries consider AODD/peristaltic
Accessories That Make Mag-Drive Installs Bulletproof
- Run-dry protection: power monitors, temperature switches, or flow/pressure interlocks
- Leak detection: containment shell sensors, drip trays, secondary containment
- Priming/venting: auto-vents for off-gassing fluids; suction strainers sized for NPSH
- VFD: soft-start and performance trim; watch minimum flow to protect bearings
Mag-Drive vs. Other Common Pump Types
| Use Case | Mag-Drive | Sealed Centrifugal | AODD | Peristaltic |
|---|---|---|---|---|
| Leak-free / emissions | Excellent | Seal plan required | Good (sealless) | Excellent |
| Corrosives / solvents | Excellent | Good (materials dependent) | Good (materials dependent) | Fair/Good |
| Solids / slurries | Poor/Fair | Fair | Great | Great |
| Run-dry tolerance | Poor (protect) | Poor (seal damage) | Excellent | Excellent |
| Energy efficiency | High | High | Moderate | Moderate |
What We Need to Size Your Mag-Drive (5-Minute Worksheet)
- Flow & head (duty point) and piping sketch
- Fluid (SDS), SG/viscosity, temperature, vapor pressure
- Suction conditions: flooded vs. lift, NPSHa, venting needs
- Materials preferences: PP, PVDF, ETFE-lined metallic
- Controls & interlocks: VFD, run-dry/leak detection, min-flow
Top Mag-Drive Lines We Stock (Placeholders)
Send your duty point and fluid—We’ll return curves, torque margin, NPSH, and a complete BOM.
Need a Leak-Free Mag-Drive Spec’d Fast?
Share duty, chemistry, temp, and suction conditions. We’ll return a safe, torque-margin-verified selection with protection and accessories.
Mag-Drive Pump FAQs
Can mag-drives run dry?
No—bearings and containment shell rely on liquid for cooling. We add power or temperature monitors and flow/pressure interlocks to prevent dry-run damage.
PP vs. PVDF vs. ETFE—how do I choose?
PP suits many acids at ambient. PVDF covers more aggressive chemistries and higher temps. ETFE-lined metallic handles solvents and elevated temperature/pressure with permeation resistance.
What causes “decoupling” and how do you prevent it?
If torque demand exceeds the magnet set (e.g., high SG/viscosity, vapor lock, or blocked discharge), magnets slip. We confirm torque margin, manage NPSH, vent off-gassing fluids, and set protection interlocks.
Can mag-drives handle solids?
They prefer clean fluids. Use strainers and confirm particle size limits. For slurries, we’ll typically move to AODD or peristaltic technology.